Filter



Nu. |l,bl.

W. B. HYE.

FlLTER.

(Application filed .Tan. 27, 1898.)

(No Model.)

UNITED STATES PATENT 'FFICE,

WALTER B. NYE, OF BROOKLINE, LIASSACH'USETTS ASSIGNOR, BYslHESNEASSIGNLIENTS, TO THE NEKV i oRK FILTER 1\IANUFACTURING COlVI PA NY, OFNEW JERSEY.

SPEGIFICATION .formingpart of Letters Patent N 617,861-,dated January17,1399.

Application filed January 27, 1898. Serial Nc- 668j224. (No model.)

Ta kill 10700721, .it 770w:/ concern ,Be it known that I, WALTER B. NYE,a citizen of the United States, residing in Brookline,

in 'the county of Norfolk and State of Massa: chusetts, have invented anImprovement. in Filters, of which the following description, in

` -connectionwith the accompanying drawings,

t-able meansmay and preferably Will be a plu` rality. of pip'es orconduits, preferably connected to theagitator to revolve therewith ;inclose proximity' to the upper surface of the filter-bed whentheagitatoriis in substantially its 'lowest position in'said bed, andthe said rotatab le conduits preferably' communicate with a centralwell, through which the wash water is discharged. The `rotatableconduits are preferably provided with enlarged inlet ports or 'openings,which may be and prefejrablyare located near the outer ends of saidconduits and are especially adapted to.

efiect the removal of the impurities Which are thrown by centrifngalaction toward the 'outer edgepf the filter-bed. These and other featuresof this invention will be pointed out v in the claims at the; end ofthisspeeification; Figure 1 represents in section and el'evation 'oneform' of mechanical filter embodying this inventionpFi'g. 2, a sectionaldetail on the line 2 2," Fig. 1; Figs3, a sec'tional detail on the line3 3, Fig. 1; and Figs. 4 and details to be referred to.

In the mechanical filter herein shown as embodying this invention, Arepresents a circn-u lar tank or Vessel to* contain th'e filter-bed,(represented by the dotted linea.) The filter: bed a rests upon a bottomcomposed, 'as shown, of a series of radial collecting--trays or pans a',each havinga perforatedpr fO-.'

- vided with a piston b b lines.) Thecylinder b is'provided with sub:

rarninous top a? and commnnicating with a passage a in a casting (1,formi ng part' of a central well, the saidcasting having a chainber :1.with which f colnninnicatesa pipe (t f havinga branch pipe (L8, .and thesaid casting has formed integral with 'it' a pipe a", 'extended throughthe chamber a? 'and communicating at one end with a pipe a provided witha branch pipe'a and having its other end communicating with a cylinder aerected upon andsecured to 'the said casting;

the said cylinder extending above the filterbed a.

thickened fiange C614, *which rests upon the`- bottom properyof the tankor vessel, which -bottom 'maybe two layers a a, of board,

upon. which is laid a. bed (2, of cement, ,in which the collectingtraysor pans are placed. The Vessel or tank A contains a rotatableagitator, preferably of the construction herein shown; -it 'consistingof a series of radi'al arms b, provided with depending teeth b' and. at-

The casting 'af is provided .with a v tached to a hub b fast on a shaft'or rod b extended up out of the tank and`,'as` hereinshown, into .acylinder .b wherein it is 'pro- (Indicated' by dotted stantiallydiametrically opposite guideways b (see Fig. 4,) which extendlongitudinally of the saidcylinder and into which project lugs b on thepiston, so that the piston may be reciprocated 'While the cylinder isbeing re`- volved by suitable driving mechanism, which is shownas abevel-gea'r b fast to the cylin der, v a bevelrpinion Z9 meshingtherewith and fast on a counter-Shafi: Z7 provided with 'a large gear Z7with which meshes a pin'io'n Z7 on amai-n shaft 12 providedwith a loosepulley b and with a'clutch mechanism 73 4 The shafts b b are suitablysnpportedin uprights 'T3 erected upon cross-beams b securedto the-*tankA. The piston is reciprocateQd in its cylinder b by means of water or'otherflnid-admitted into the opposite ends of the'ic'ylinder, it beingadmitted directly into .the upper end through an -`inlet-pipe 73 andinto the lower' end by a brazzhpipe Z2 5; The

`pi a a `are provided with's'nitable valves 17 b 'and *the .valvas Z9pipes d" a 'with suitable During the processof filtration theagitato'rtereo. \vater 1s aQmlLLeu lllbu une [Ja-LIA Ul vesselA through the pipesa OL and cylinder (1 the valve ?J being opened and the valve Z1 beingclosed. The unfiltered water percolates through the filter-bed andpasses into the collecting-trays a', from which it runs through thepassages 0x into the chamber a and thence through the outlet-pipe (6 forthe filtered water, the valve Z1 being open and the vaLye ?J beingclosed.

When it is desired to wash the filter-bed, the agitator is lowered andthe teeth b' penetrate into the filter-bed to near the perforated bottomthereof and the said agitator is revolved to stir up or loosen thesandor other granular material of which the filter-bed is composed, so thatfiltered water passing up through the filter-bed may cleanse the same ofixnpurities and foreign' matter intercepted by it. V

The filtered water for washing the filter- -bed is admitted into thetank through the branch pipe a the valve ?J being closed, and thenpasses th rough the pipe a into the chamber a, from whence it passesthrough the passages a? into the collecting-trays a.' and thence upthrough the filter-bed, carrying with it the intercepted matter in thefilterbed. The greater portion of the wash-water, with its impurities,passes from the tank down through.the cylinder 01. of the central well,into and through the pipes a a andout through the branch pipe a, thevalve 13 being open and the valve ?J being closed.

A considerable portion of the intercepted b matter carried to thesurface of the filter-bed is thrown by centrifugal action, caused by therotating agitator, towardthe circumference or outer edge of thefilter-bed-that is, toward the sides ot' the tank or vessel--and thisportion of the intercepted matter may be removed by means of one or moreconduits, which in the present instance are two in number and are shownas horizontally-extended pipes-c, carried by the radial arms b, to whichth cy may be secured in any suitable or desired manner. The pipes cextend to near the circu mferential wall of the tank and may andpreferably will be provided with enlarged inlets, preferably hollowcastings c', having enlarged months '0 which incline downward from thesaid pipes and which are revolved in close proximity to the uppersurface of the filter-bed. Each pipe or conduit c may be' provided witha depending or draft leg 0 extended into the cylinder L1 of the centralwell and movable vertically therein when the agitator is raised andlowered. l.

Instead of providing each Conduit or pipe c with a depending leg all the'pipes c may be connected to a single vertical leg. The depending leg ofthe conduit or conduits acts as a siphon to draw the water containingintercepted matter through the said conduits int-o the cylinder a of thecentral well, from which it is carried oflE through the pipes a a and oouww.

The Ina-in body of wash-water passing directly downthrough the cylindera of the central well creates a suction which facilitates the removal ofthe intercepted matter near the walls of the tank. The piston rod orshaft b may and preferably will be guided and supported at its lower endby a guidetube d, attached by arms d' to a ring d which may be clampedor secured to the casting a** by the cylinder 01.

I have herein shown the conduit c as separate from the agitator-arms b;but it' is evident that the said arms may bc' made hollow and providedwith an inlet opening or open ings, so as to form conduits for thewashwater.

The agitator lnay be revolved ineither direction, bnt preferably so thatthe month of the conduit c is drawn through the water rather than forcedthrough it.

I claim b 1. In a filtering apparatus,the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a'filter-bedtherein, an agitator adapted to be inserted into and withdrawn from saidfilter-bed, a central well extended above the filter-bed, and a conduitfor the intercepted matter washed 'from said filter-bed, communicatiu gwith said central. well and extended toward the walls of v thefilter-tank above the filter-bed and provided' with an inlet port oropening near its end, for the purpose specified.

2. In a filtering apparatus, the combination of the followinginstrumentalities, viz:- afilter tank or Vessel containing a filter-bedtherein, a central well extended above the filterbed, and a conduit forthe wash-water extended above the filter-bed toward the outer edge.thereof and provided with an inlet port or opening and with a dependingleg which commnnicates with and discharges the washwater from saidconduit into said central well, substantially as and for the purposespecified.

`3. In a filtering apparatus, the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a filter-bedtherein, and a conduit for the wash-water extended from the centertoward the outer edge of the filter-bed above the upper-surface of the psame and provided with an inlet port or opening and with a depending.outlet or discharge leg, substantially as described.

4. In a filtermg apparatus, the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a filter-bedtherein, a rotatable agitator adapted to be inserted intoand withdrawnfrom said filter-bed, and

a conduit for the wash-water attached to said agitator to rotatetherewith above the filterbed when the agitator is inserted into saidbed, and comprising a substantially horizontal pipe extended from nearthe center to near the outer edge of the filter-bed and provided nearits outer end with an inlet port or open- IIO tal pipe extended fromnear the center to near the outer edge of the filter-bed and providednear its outer end with an inlet port or opening and at its inner endwith a depending leg, and a central well with which the said dependingleg commuuieates and in which it moves' vertically, substantially asdescribed.

G. In a filtering apparatus, the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a filter-bed,a rotatable agitator adapted to be inserted into and withdrawn from saidfilter-bed, and a conduit for the wash-water in said tank comprising apipe extended above the filter-bed from near its center toward its outeredge and provided with -an inlet -port or opening near its outer endinto which the wash-water above the filter-bed may pass when theagitator is inserted into said filter-bed, for the purpose specified.

'7. In filtering apparatus, the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a filter-bed,'a rotatable agitator adapted to be inserted into and withdrawn fromsaid filter-bed, and a couduit for the wash-water in said tankcomprising a. pipe extended above the filter-bed from near its centertoward its outer edge and provided with an enlar'gedinlet port oropening near its outer end into which the wash-water above thefilter-bed may pass when the agitator is inserted into said filter-bed,for the purpose specified.

8. Ina filtering apparatus, the combination of the followinginstrumentalities, viz: a filter tank or Vessel containing a filter-bedtherein, an agitator to loosen up the filter-bed, and a Conduit for theintercepted matter washed from said bed extended from the center towardthe outer edge of the filter-bed above the upper surface thereof andprovided with an inlet-opeuing near its outer end, fot: the purposespecified.

In testimon y whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

XVALTER B. NYE.

\Vitnesses z JAS. II. CHURCIIILL, J. MURPHY.

